Email verification for cold outreach
Cold email lives or dies on sender reputation, and one bad list can burn a domain. Verify every prospect before you send, so your bounce rate stays low from the first message.
How it works
- 1
Export your prospects
Export your list from your lead source, spreadsheet or outreach tool as a CSV.
- 2
Verify and filter
Upload to MailSure and download valid only. Hold risky addresses back for a small test batch.
- 3
Send in small, steady batches
Start a new domain slowly and watch bounces. Most senders aim to keep hard bounces well under 2%.
Why use MailSure for this
Protect your domain
Mailbox providers watch bounce and complaint rates. Verified lists keep both low.
Cheaper than a burned domain
At $20 for 10,000 verifications, checking a list costs far less than replacing a damaged sending domain.
Check your copy too
The free cold email checker reviews your subject and body for spam triggers, unfilled merge tags and missing opt-outs before you hit send.
See how the price compares in the pricing comparison, or try the free email checker first.
Frequently asked questions
- What bounce rate is acceptable?
- Most senders aim for under 2%, and many aim well below 1%. Anything higher is a signal to clean your list.
- Does verification guarantee inbox placement?
- No. It removes addresses that will bounce. Placement also depends on authentication (SPF, DKIM, DMARC), content and sending history.
- Should I send to risky addresses?
- Treat them cautiously: a small separate batch, watching the bounces, is safer than including them in a main send.